A High Surf Warning has been issued for the north and west facing shores of Kauai and Niihau and the north shores of Oahu, Molokai and Maui. There's also a High Surf Advisory for the west shores of Oahu and the Big Island of Hawaii.
The warnings and advisories will remain in effect until 6 a.m. Tuesday.
Forecasters at the National Weather Service said forerunners of the swell began arriving Sunday morning. Surf in the warning areas could rise to 20 to 25 foot face heights this evening. Surf at Leeward Oahu beaches could reach 10 to 15 feet, while surf on the west shores of the Big Island may reach heights of six to ten feet.
In high surf warning areas, beachgoers should be aware that a significant shore break and dangerous currents make entering the water very hazardous, and that anyone entering the water could face significant injury or death. Boaters should also be aware of an increased number of surfers and body boarders using harbor channels to get to surfing areas.
Two California men died in warning-level waves earlier this month at Kalihiwai Bay on Kauai.
Beachgoers in advisory areas should expect strong breaking waves and shore breaks, along with strong long shore and rip currents that will make swimming difficult and dangerous. People should heed all advice and warnings from lifeguards.
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